Saturday, 21 November 2015

Starting the day with a good cup of coffee is desirable to
everyone out here. Brewing coffee with the best siphon coffee brewer yields a good
quality coffee.

Why the name siphon?

A vacuum coffee brewer or as popularly known as the siphon
coffee brewer acts like a siphon. The

word siphon derives its origin from Greek
word meaning a tube and generally refers to flowing of various liquids through
the tubes. It mainly consists of an inverted ‘U’ tube which makes the liquid to
flow up the tube without the help of any external pump and then makes the
liquid to flow down freely with the help of gravitational pull.The flow of the liquid is mainly governed by the expansion
and contraction of the vapour pressure created inside the pot and hence the
other name of the brewer is vacuum coffee brewer.

The siphon brewer mainly consists of four parts namely the
bottom container which carries the water, the top vessel which allows the
coffee grounds to reside, the stem or the tube connecting the two containers
where the actual brewing takes place and the filter which separates the final
coffee liquid from the coffee grounds. The filter can be made up of cloth,
glass, metal and non-metal mesh, etc.

Apart from the coffee pot, the basic thing that make the
siphon brewer to operate is the heating method. The various types of heating
sources available are -alcohol burner (being the slowest), gas or electric
stove burner (faster) and butane burner, which is the fastest among all.

Operating Principle of siphon coffee
pot

The basic principle that makes the siphon coffee brewer to
operate is the suction method that is contraction and expansion of water vapour
allows the movement of the liquid inside the vessel.

After the coffee pot is assembled together and is ready for
use, heat is applied at the bottom of the container containing water. As water
starts heating slowly the water reaches its boiling point and exceeds the
atmospheric pressure and eventually gets converted to steam or vapour. Once the
water starts changing its state from liquid to vapour, the pressure also
increases inside the container.

Water in its vapour form requires a lot more space to
accommodate itself than it requires in its solid or liquid state and the vapour
being light in weight always has a typical tendency to rise upwards. Inside the
siphon container since there already exists a pressure change the vapour tries
to move to the top container and the only available path it gets to move up is through
the siphon tube and in turn it pushes the water to flow up the siphon tube to
the upper vessel. The coffee is mainly brewed inside the siphon tube under a
constant pressure and a constant heating is also maintained.

When the coffee is brewed completely quite for some time,
the siphon pot is removed from heat and placed on a cool surface which allows
the vapour pressure inside the vessel to tickle down and the force of gravity
along with atmospheric pressure allows the liquid to fall down getting filtered
through the filter and get separated from the coffee grounds. The final coffee
is then collected from the bottom vessel.

Concept of brewing using siphon
coffee pot

If you already have brewed coffee before then brewing coffee
using siphon coffee pot is really very easy. Although brewing coffee in siphon
pot looks easy but at the same time it is difficult to handle as well. Since all
the variables responsible for making a good coffee needs to be taken care
manually so for a person with little or no experience for brewing coffee it may
result in a blunder.

The first step to brew coffee in siphon pot involves heating
the water in the siphon pot to allow it to convert to steam which then being
light in weight rises up and in turn pushes the water through the stem.The
coffee and steam are mixed up properly with sudden force and once the mixture
is blended nicely and the coffee is ready to be drained off from the pot, the
heat is removed and the pot is placed on a cool surface.
The pressure change allows the coffee to flow down to the bottom vessel through
the tube.